RHS · EN 10219 · cold formed
RHS 350×250/6.3 is a cold-formed rectangular hollow section per EN 10219: height 350 mm, width 250 mm, wall thickness 6.3 mm, weight 57 kg/m, cross-section area 72.7 cm², moment of inertia Iy = 12920 cm⁴, elastic section modulus Wel,y = 738.5 cm³.
Check to EN 1993-1-1
Enter the design loads and the section is checked for bending, shear and compression with flexural buckling.
The compression check is not available: in uniform compression the section is class 4 and effective properties per EN 1993-1-5 are required. Bending and shear are unaffected.
Yield strength is taken from the product standard for the governing thickness, so above 16 mm it is lower than the nominal grade. Simplified checks per EN 1993-1-1, without M+N+V interaction, without lateral-torsional buckling and without web shear buckling. Verify with a full design.